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Use of Direct Mapping in R2RML
From RDB2RDF
R2RML constructs where use of Direct Mapping makes sense
A few examples are shown below:
- rr:subjectMap
- <#TriplesMap1> rr:subjectMap rr:DirectMap .
- rr:predicateObjectMaps => Avoids having to enumerate all the desired rr:PredicateObjectMap elements
- <#TriplesMap1> rr:predicateObjectMaps rr:DirectMap .
- <#TriplesMap1> rr:predicateObjectMaps [rr:exclude "job","etype"] .
- <#TriplesMap1> rr:predicateObjectMaps [rr:include "empno","deptno"] .
- rr:refPredicateObjectMaps
- <#TriplesMap1> rr:refPredicateObjectMaps rr:DirectMap .